She said voters right now, especially women in New Hampshire, are looking for a "softer tone" and that Trump doesn't need to go on the attack, since he has a big lead in the polls there.

"He's dragging Iowa into New Hampshire, which is not rational. I think it's a huge political miscalculation. ... He thinks that Cruz voters are naturally his voters, but what he doesn't understand is Cruz isn't a threat to him in New Hampshire," said Tantaros.

Instead of attacking, she said Trump needs to learn a lesson from what happened in Iowa, and focus on doing town halls and shaking hands with voters in New Hampshire.

Julie Roginsky agreed that Trump "sounds like a sore loser" after Iowa, which is damaging his campaign "aura" of being a winner.

Judge Alex Ferrer said Trump's accusations are "extremely damaging" to Cruz, however, since the senator has positioned himself as being outside the establishment.

He said voters may see the Cruz campaign's actions as "politics as usual."